Half to emil laass



(No Model.)

C. E.- TOML-INSON. BICYCLE FRAME.

No. 554,465. Patents-d Feb. 11, 1896.

IISIVENTOR AUORNEY ANDREW B GRAHAM.PMuTo-LrfHuWASHINGTDmnQ NiTnn STATESCHARLES E. TOMLINSON, OF SYRACUSE, NEV YORK, ASSIGNOR OF ONE- HALF TOEMIL LAASS, OF SAME PLACE.

BICYCLE-FRAM E.

vSPECIFICA'IION forming part of Letters Patent No. 554,465, datedFebruary 11 1896.

Y Application tiled January 4, 1896. vSerial No. 574,302. (No model.)

To @ZZ whom t may concern:

Beit known that I, CHARLES E. ToMLiNsoN, of Syracuse, in the county ofOnondaga, in the State of New York, have invented new and usefulImprovements in Bcycle-Frames, of which the following, taken inconnection with the accompanying drawings, is a full, clear, and exactdescription.

This invention relates to the attachment of the post and braces to thecrank-hanger of a bicycle, but has particular reference to improvementson the form of device shown in my pending application, Serial No.560,210, filed August 23, 1895.

The object of the present invention is to provide a more secure and firmfastening of the central post and lower forward brace to thecrank-hanger tube; and to this end the invention consists in certainpeculiarities in the construction of the parts named at the junctionthereof, substantially as hereinafter described and claimed.

In the annexed drawings, Figure l is a plan View of a crank-hangerembodying my invention. Fig. 2is an end View of the same minus theattachment of the roller-bearings of the crank-shaft. Fig. 3 is ahorizontal section on line XX in Fig. 2. Fig. Lis a vertical section online 'Y Y in Fig. 2, and Fig. 5 is a vertical section on line Z Z inFig. l.

A represents the crank-hanger of a bicycle. Said hanger is formed of ametallic tube, usually of steel, and provided at opposite ends withsuitable ball-bearings c for the axle d, to which the pedals I) b andsprocket-wheel F are attached. D and Dl are respectively the lower endsof the central post and of the forwardly-extending brace, and C O arethe front end portions of the rearwardly-extending braces of the frame.Said post and braces I permanently and securely attach to thecrank-hanger A by placing longitudinally in the center of said hanger acomparatively small supplemental tube c, through which the axle apasses. This supplemental tube c I utilize as a key for locking togetherthe attaching ends of the frame members D D', the ends of which latterare inserted through oriiices in the upper portion of the tube A and arecut off slanting so as to miter together, as shown at d, and extendjointly across the nedges thereof.

terior of said tube, as shown in Figs. 2, 4 and 5 of the drawings. Inthe mitered edges of the members D and D' are cut coincidingsemicircular notches, corresponding` to the external periphery of thesupplemental tube c, which passes through said notches and is brazed tothe edges thereof.

In order to maintain the members D Dl firmly interlocked with thesupplemental tube e I prefer to provide the tube A with a notch e, intowhich I insert the V-shaped joined ends d of the aforesaid members. Themembers D 4and D are brazed to each other along their mitered`Y junction CZ, and are also brazed to the edges of the orifices in the tubeA and to the notch e, and when this is effected all of said parts areinseparable.

Inasmuch as all of the brazing is made inside of the tube A, saidbrazing is invisible on the exterior of said tube and external parts ofthe members D and D', and therefore the time and labor heretoforerequired for cleaning and finishing the exteriors of said parts afterthey are brazed together are dispensed with.

In assembling said parts preparatory to brazing them I insert themitered ends of the members through the orices in the upper portion ofthe tube A and push the V -shaped joined extremities of said membersinto the notch e, and then drill holes through the sides of the membersD D adjacent. to the inner side of the tube A and insert pins ff in saidholes, which not only reinforce the attachment of said members, but alsoserve to hold the members D D in place during the process of brazing thesame. I then drill transversely through the mitered junction of themembers D D a hole corresponding to the diameter of theV supplementaltube c, which passes through said hole and is braced to the I alsoprefer to extend the fork members O into the tube A and abut themagainst the side of the tube c. The abutting ends are cut segmental toconform to and closely embrace the side of the tube c, andthuseffectually prevent vertical play of said ends of the members C C,which are further secured thereon by brazing.

The tube c I prefer to utilize for conveying lubricant to theroller-bearings, and for this IOO purpose I tap said tube by a smalllubricant pipe or duct h, which passes through the top of the tube A, asshown more clearly in Fig. 2 of the drawings. I also prefer tostrengthen the union of the members D D' by inserting into the aforesaidends of said members reinforcing-tube sections 'L' t', having miteringmeeting edges corresponding to the miter-line cl and brazed together,said meeting edges extending the entire length of the meeting edges ofmembers D D', and being formed with openings through which thesupple1nental tube c extends.

It will be observed that as the lower ends of the tubular frame membersextend entirely across the hanger-tube each of said lower endshas twopositive holds on the hangertube' at points approximately diametricallyopposite each other, thereby eiecting most efeient bracing and securingof the parts.

Wvhat I claim as my invention is- 1. The combination with thecrank-hanger tube, of tubular frame members extending jointly with theirlower ends entirely across i said hangentube to afford for each of saidmembers two positive holds on the hangertube at points approximatelydiametrically opposite each other, said tubes being united at theirmeeting edges.

2. The combination of a cranlc-hanger tube provided in one side of it-saxis with orifices and in the opposite side with a notch, and tubularframe members inserted through said orifices and mitered to each otherinside of said tube and seated in the aforesaid notch.

The combination with a crank-hanger tube, of tubular frame membersextending jointly with their lower ends entirely across the interior ofsaid tube and having said ends mitered together from one side to theother of said tube, and reinforcing-tubes inserted in said ends of theframe members and having meeting edges extending the entire length ofthe meeting edges of the frame members and mitered correspondingly.

4. The combination with a crank-hanger tube, and supplemental tuberigidly secured longitudinally within said crank-hanger tube, of tubularframe members lirmly embracing the supplemental tube to interlocktherewith, said tubular frame members extending jointly with their lowerends entirely across said hanger-tube to afford for each of said memberstwo positive holds on the hangertube at points approximatelydiametrically opposite each other.

5. The combination with a crank-hanger tube and internally-arrangedsupplemental tube7 of tubular frame members extending jointly with theirlower endsentirely across said hanger-tube and having said endsembracing between them the aforesaid internal tube and mitered togetherabove and below the latter.

6. The combination with the tube A of the frame members D D' extendingwith their ends diametrically across the interior of said tube andunited thereat, the tube c passing through the junction of saidmembers', and the fork members C C inserted with their ends through theside of the tube A and terminated with segmental-shaped ends abuttingagainst the side of the tube c, all permanently united by brazing as setforth.

In testimony whereof I have hereunto signed my name this 31st day ofDecember, 1895.

CHARLES 1i. roiimxsoN. n.. s]

VVitn esses JOHN J. LAAss, G. L. BENDIXON.

